Cell Junctions and Cell Signalling Pathways · Zoology

Second messengers such as cAMP function to:

  1. Bind DNA directly to alter transcription
  2. Amplify the signal inside the cell
  3. Degrade signaling proteins after use
  4. Block receptor activation at the surface
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Correct answer: Amplify the signal inside the cell

Second messengers amplify the signal initiated by ligand-receptor binding. A single receptor activation can generate many second messenger molecules.

Difficulty: Medium Question 9 of 20

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